As tropical storm Arthur spins over warm Atlantic waters, the storm is expected to intensify into a category 1 hurricane sometime Thursday as it approaches the coast of South Carolina.

As tropical storm Arthur spins over warm Atlantic waters, the storm is expected to intensify into a category 1 hurricane sometime Thursday as it approaches the coast of South Carolina.

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Updated: 6:31 AM EDT Jul 2, 2014

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WEBVTT SANDRA SHAW IS TRACKING TROPICALSTORM ARTHUR AND TELLS US WHEREIT IS NOW.IT'S JUST TO OUR NORTH ANDEAST.IT'S RUNNING PARALLEL TO CAPECANAVERAL.IT'S 90 MILES EAST OF CAPECANAVERAL.HEAVIEST RAINS CONTINUE TO BE ONTHE EAST SIDE OF THE SYSTEM.IT'S NO SURPRISE.TYPICAL FOR A TROPICAL CYCLONE.THE IMPACT HERE THIS MORNINGREALLY NIL.WE'RE SEEING VERY STRONG WINDS,THOUGH.60MPH WINDS.NOW EXTENDING FURTHER OUT FROMTHE CENTER UP TO 80 MILES OUT.THESE TROPICAL STORM FORCE WINDSEXTEND.ARTHUR WILL LIKELY BECOME AHURRICANE TOMORROW.HERE'S WHY: PRESSURE CONTINUESTO DROP.IT'S DROPPED SIGNIFICANTLY SINCETHE 11:00 P.M. ADVISORY.THE PRESSURE DROPS, THE WINDSPICK UP.IT WILL ENTER THAT GULF STREAMWITH THE VERY, VERY HOT WATERSAND WILL LIKELY BLOW UP BEFOREIT SKIRTS THE SHORES OF THECAROLINAS.POSSIBLY WITH 90MPH WINDS BY THEFOURTH OF JULY.IT'S MOVING AWAY FROM US,THOUGH.IT'S MOVING TO THE NORTH AT6mph.FAIRNT AWAY FROM US IT GETS, THEBETTER WE'RE LOOKING.TODAY WE COULD SEE A COUPLEISOLATED DOWNPOURS, BUT NOT ASPERVASIVE AS THE LAST FEW DAYS.THE BAHAMAS STILL GETTINGHAMMERED WITH THOSE OUTER SPIRALBANDS, NUMEROUS LIGHTNINGSTRIKES.NOTHING ON FIRST ALERT RADARTHIS MORNING.A QUIET START.WE COULD SEE A COUPLE DOWNPOURS.THE WINDS PICK UP.IN THE MEAN-TIME, ARTHURINTENSIFIES, TAKING FORWARDMOMENTUM PUSH AS IT PICKS UPSPEED AND GOES NORTH AND EAST.BY TOMORROW IT'S OFF THE SHORESOF THE CAROLINAS AS A CATEGORYONE HURRICANE.FOR US, BREEZY AND TROPICALLY

Tropical storm Arthur to intensify Thursday

As tropical storm Arthur spins over warm Atlantic waters, the storm is expected to intensify into a category 1 hurricane sometime Thursday as it approaches the coast of South Carolina.